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A Highly Configurationally Stable [4]Heterohelicenium Cation
Author(s) -
Herse Christelle,
Bas Delphine,
Krebs Frederik C.,
Bürgi Thomas,
Weber Jacques,
Wesolowski Tomasz,
Laursen Bo W.,
Lacour Jérôme
Publication year - 2003
Publication title -
angewandte chemie international edition
Language(s) - English
Resource type - Journals
SCImago Journal Rank - 5.831
H-Index - 550
eISSN - 1521-3773
pISSN - 1433-7851
DOI - 10.1002/anie.200351443
Subject(s) - helicene , enantiomer , chemistry , circular dichroism , ion , spectroscopy , crystallography , stereochemistry , molecule , organic chemistry , physics , quantum mechanics
A [4](hetero)helicenium cation was resolved using the hexacoordinated phosphorus‐containing binphat anion (see picture: N, blue; O, red; C, gray). Its absolute configuration was determined by vibrational circular dichroism spectroscopy. The barrier of interconversion of its enantiomers is higher than that of [6]helicene.